activity for the nfl. the greater the athlete is, the greater his chances. so i'd say if anyone could, he probably has the best chance of getting back in. >> steve: do you think he would have had to have had the surgery had he not played that last game? >> it's difficult to determine because we don't know how much damage he had before that last game. >> steve: this is the knee joint. show us where they did the operation. this is front of the knee, the kneecap. >> one ligament called the lateral collateral was torn. and that had to be repaired by either putting in stitches or reattaching it to the bone at one end or the other. >> steve: then the acl, how do you get to that? there it is in there, inside. >> the acl is a very important ligament 'cause that gives stability to the knee. that had to be replaced a second time around with a tendon from his opposite knee. >> steve: now, people have this surgery to repair these things frequently and they're back 100%, pretty close. >> pretty close. but that's not th